Global Patent Index - EP 2109093 A1

EP 2109093 A1 20091014 - Scanning backlight colour control

Title (en)

Scanning backlight colour control

Title (de)

Farbsteuerung für abtastendes Rücklicht

Title (fr)

Contrôle de la couleur de rétroéclairage à balayage

Publication

EP 2109093 A1 20091014 (EN)

Application

EP 08154288 A 20080409

Priority

EP 08154288 A 20080409

Abstract (en)

A scanning backlight (70) for a display, the backlight having a number of sections separately illuminated, a controller (20) to control the illuminating of the different sections at different times, and to control relative luminance levels of the different sections, and the backlight having a sensor (60) to detect a spectrum of the lighting, the controller being arranged to control a colour of the illuminations of the different sections according to the detected spectrum. This combination can enable the colour output to be maintained accurately without needing an external spectrometer, and control the uniformity of colour in the different sections. This control can enable the specifications of any parts used to illuminate the sections to be relaxed, such as temperature and aging specifications, to keep the costs lower.

IPC 8 full level

G09G 3/34 (2006.01)

CPC (source: EP US)

G09G 3/3413 (2013.01 - EP US); G09G 3/342 (2013.01 - EP US); G09G 2310/024 (2013.01 - EP US); G09G 2320/0233 (2013.01 - EP US); G09G 2320/0666 (2013.01 - EP US); G09G 2360/145 (2013.01 - EP US)

Citation (applicant)

Citation (search report)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

Designated extension state (EPC)

AL BA MK RS

DOCDB simple family (publication)

EP 2109093 A1 20091014; US 2009278789 A1 20091112

DOCDB simple family (application)

EP 08154288 A 20080409; US 42054209 A 20090408